1GB BFG GeForce GTS 250 DDR3 PCI Express PCI-E 2DVI Video Card BFGRGTS2501024DE GPU: GeForce GTS 250. Core Clock: 738MHz. Shader Clock: 1836MHz. CUDA Cores: 128. Effective Memory Clock: 2000MHz. Memory Size: 1GB. Memory Interface: 256-Bit. Memory Type: GDDR3. BFG Tech GTS 250. Interface: PCI Express 2.0 x16. DirectX 10. OpenGL 2.1. 2 x DVI. HDTV / S-Video Out. Max Resolution: 2560 x 1600. SLI Support: 2-Way & 3-Way. Power Connector: 6-Pin. Cooler: With Fan System Requirements: 450W PCI Express-compliant system power supply with a combined 12V current rating of 24A or more